Chachoengsao is a town located in central Thailand and serves as the capital of Chachoengsao Province. It is situated on the banks of the Bang Pakong River.
The town encompasses tambon Na Mueang along with portions of Ban Mai, Bang Tin Pet, Wang Takhian, and Sothon within the Mueang Chachoengsao District. As of 2006, the population of the area was recorded at 60,893.